DNA Paternity Testing From DNA Diagnostics Center. DDC is one of the largest DNA testing companies in the world. Founded in 1995, DDC offers comprehensive DNA testing services for paternity and other family relationships. DDC performs over 600,000 DNA tests annually.
Here are some examples of heat energy. 1  The biggest example of heat energy in our solar system is the sun itself. 2  The sun radiates heat to warm us up one the planet earth. 3  When the burner of a stovetop is very hot, it is a source of heat energy.
Geothermal energy is a renewable energy source because the heat is continuously produced inside the earth. The word geothermal comes from the Greek words geo (earth) and therme (heat). Geothermal heating units use the earths natural heat to warm and cool your home for sustainable, environmentally friendly comfort. The Earth is like a âsolar batteryâ absorbing nearly half of the sunâs energy.